PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/22-21:13:10
G07     346.7          62.3               12.3 +/-    0.35      13.6 +/-    0.35  0.030 / 0.040
G08     89.1           51.6               11.7 +/-    0.60      14.5 +/-    0.60  0.050 / 0.040
G09     187.1          70.0               13.2 +/-    0.62      13.9 +/-    0.62  0.080 / 0.060
G11     141.8          16.5               16.7 +/-    2.61      40.0 +/-    2.61  0.110 / 0.070
G23     157.4          39.4               12.5 +/-    0.93      18.3 +/-    0.93  0.080 / 0.140
G27     53.6           31.5                9.9 +/-    1.42      16.8 +/-    1.42  0.110 / 0.140
G28     239.1          29.3               14.4 +/-    1.28      25.6 +/-    1.28  0.030 / 0.030
G30     304.8          37.6               11.9 +/-    1.08      18.1 +/-    1.08  0.030 / 0.020